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Erschienen in: Experiments in Fluids 5/2021

01.05.2021 | Letter

A fundamental link between steady asymmetry and separation length in the wake of a 3D square-back body

verfasst von: En-Chi Hsu, Luc Pastur, Olivier Cadot, Vladimir Parezanović

Erschienen in: Experiments in Fluids | Ausgabe 5/2021

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Abstract

Suction applied at the base of a square-back Ahmed body is shown to create a global effect on the wake, reducing the recirculating bubble length and increasing the base drag. Weak suction causes a small shortening of the bubble and intensifies the steady reflectional symmetry breaking (RSB) mode present in the horizontal direction. Stronger suction significantly suppresses the RSB mode, indicating that the steady asymmetric instability does not bear a highly curved bubble. The stabilized wake experiences very low frequency oscillations in the horizontal direction together with a well synchronized shedding mode in the vertical direction.

Graphic abstract

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Metadaten
Titel
A fundamental link between steady asymmetry and separation length in the wake of a 3D square-back body
verfasst von
En-Chi Hsu
Luc Pastur
Olivier Cadot
Vladimir Parezanović
Publikationsdatum
01.05.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Experiments in Fluids / Ausgabe 5/2021
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-021-03201-y

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